#include <iostream>
#include <string>
using namespace std;

int main()
{
	const string s1 ="hello" ,s2= "world";
    string s;
	 
	s = s1+s2;
   cout <<s<<endl;
   //output:helloworld
   cout <<s.size()<<endl;
   return 0;
}
/**
output:
helloworld
10
*/